Regenerative-cycle incandescent lamp containing a dual-additive
CA 1064090 A · Owner: Westinghouse Electric Corporation · Inventors: Martin, Jack; Kulkarni, Avinash D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The quality and useful life of regnerative-cycle type incandescent lamps that employ iodine as the halogen are enhanced by dosing the lamps with controlled amounts of SnI4 in combination with elemental iodine. Alternative dual-additives that provide iodine-bromine type lamps are SnI4 in combination with a compound such as methylene bromide (CH2Br2) or mercury bromide which decompose within the energized lamp and release free bromine and mercury, iodide in combination with CH2Br2. The combined use of two different additives or dosing materials to provide either an iodine or an iodine-bromine atmosphere within the operating lamp permits elongated tubular lamps having singly-coiled filaments …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted October 9, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 9, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.